381 ;;Quote: use rapid, overlearned, uniform responses to study the capacity of the motor system independently from the sensory system

381 ;;Quote: the information capacity of the motor system can be inferred from the statistical variability of successive, uniform responses

382 ;;Quote: duration of independent repetitive motion is essentially independent of its extent; e.g., consistent tapping rate from 1 to 40 mm or handwriting at various sizes

384 ;;Quote: Fitts studied reciprocal tapping between strips of metal, disc transfers between pins, and pin transfers between strips of holes

385 ;;Quote: for each amplitude, slightly more errors occurred as tolerances decreased; subjects did not slow down enough

387 ;;Quote: for targeting tasks, the rate of performance increases uniformly as movement amplitude decreases and tolerance increases

387+;;Quote: the amount of information needed to perform a targeting task is proportional to log(tolerance/amplitude)

387+;;Quote: if amplitude and tolerance are fixed, response time is proportional to the information per response

387+;;Quote: when measured in information units, the performance capacity of the human motor system is relatively constant over a considerable range of task conditions; 10-12 bits/sec over much of the range from 1 to 10 bits/response